The man who was the police district commander on the night Oscar Pistorius shot and killed his girlfriend Reeva Steenkamp was back on the witness stand Friday and had to explain several slip-ups made by investigators.

Schoombie van Rensburg, who has since retired and is now a sports coach, said he was furious when he learned two expensive watches had been stolen from Pistorius' home right after the shooting. He also said he had to chastise a ballistics expert who was caught handling Pistorius' gun without gloves.

Several graphic photos were shown during van Rensburg's testimony Friday, the tenth day of trial, including pictures of a deceased Steenkamp and the blood-filled toilet where she was shot. A photo of a bloody, shirtless Pistorius was also shown to the court.

Pistorius has never denied shooting Steenkamp, but insists he did so after mistaking her for an intruder. He has pleaded not guilty to premeditated murder. Prosecutors, however, allege Pistorius intentionally shot Steenkamp following a heated argument in the early morning hours of February 14, 2013.

Oscar Pistorius arrives at the courthouse Friday, the tenth day of his murder trial.

Colonel Schoombie van Rensburg, the police district commander on the night of the incident, is back on the witness stand. He said that Pistorius' bathroom window was too high for someone to gain access from the outside. In the picture that is shown to the court, one side of the windows has been opened and the blinds are halfway up. Pistorius claims he shot through the bathroom door because he heard an intruder come in through the window.

A photo that captured a shirtless, bloody Pistorius after the shooting was shown in the courtroom.

Van Rensburg said there were eight watches inside Pistorius' home. He said he thought, "This is tempting for any person because this is expensive watches."

One of the watches went missing, according to van Rensburg, who said a police photographer told him Pistorius' sister had taken it.

Then another watch went missing, according to van Rensburg. He said he couldn't believe it. All of the investigators and technicians were gathered together and searched, but nothing was found.

"I was furious," said van Rensburg, who started documenting everyone who entered and left the scene.

Another uh-oh at the crime scene: Van Rensburg said he caught the ballistics expert handling Pistorius' gun without gloves.

The door was the most valuable evidence, according to van Rensburg, since Steenkamp was behind the door when she was shot.

On cross-examination, van Rensburg again describes Pistorius' state when he arrived: emotional, crying, very upset.

Barry Roux, Pistorius' defense advocate, gets van Rensburg to admit that he did not notice there is a toilet window in Pistorius' bathroom.

Roux said there were actually nine watches in Pistorius' home -- not eight -- and points to a photo showing an additional watch on the dresser, which he said went missing as well. Van Rensburg said he wasn't made aware of the watch on the dresser.

A lighter moment as Roux said he was trying to find more questions for van Rensburg so he could use up the remaining time. Many in the courtroom laugh.